Phase contrast radiography with a microfocus tube providing X-rays having an average energy between 10 and 20 keV

摘要

An X-ray source, a test substance holding section and an image recording section are arranged and structured to conduct a phase contrast radiographing such that when R1 represents a distance (m) from a focal point of the X-ray source to the test substance held by the test substance holding section and R3 represents a distance (m) from the focal point of the X-ray source to the X-ray detector, a magnifying power M represented by the formula of (M = R3/R1) is from 10 to 40 and an X-ray arrival ratio of an amount of X-rays having arrived to the X-ray detector to an amount of the emitted X-rays is 45 % or more.